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Therm-X MVHRU HR95
Technical Manual
Page 58 of 59
Version 2.4, 25/09/2020
9.24.
The unit shall provide condensate overflow protection via the integral condensate level sensor. The operation
of the unit shall be stopped if there is risk of the condensate tray overflowing.
9.25.
The controls shall include alarm signalization whenever a failure of fan, filter or sensor occurs. Emergency
overheating alarms shall also be available for the electric heaters if installed. The alarms shall be displayed on the
handheld controller and provide information about the cause of the error.
9.26.
The unit controls shall allow individual testing of each component to facilitate isolation of faults.
9.27.
The unit shall provide an external enable/disable, error and run signalization relay contacts.
9.28.
The unit shall provide automatic calibration of the fans and filters in order to facilitate commissioning.
9.29.
The unit shall provide continuous monitoring of the filters dirtiness and inform the user when the filter requires
replacement.
9.30.
The unit shall provide BMS integration via Modbus RTU RS485, Modbus TCP/IP and BACNET TCP/IP
protocol allowing full control and monitoring of the unit.
9.31.
The unit shall provide soft start-up and memory of the last operating status in the event of a power failure.
9.32.
The unit shall provide end user access protection with PIN access code. Different levels of protection shall
be available.
9.33.
The unit shall provide automatic Winter/Summer time switch.
9.34.
The unit shall be able to control external fresh and exhaust air shut-off dampers. The dampers shall be
normally open when the unit is operating and closed when the unit is not in operation to avoid outside air drafts
into the conditioned space.
9.35.
The unit shall be able to control a second external pre heating coil
–
either electric or water
–
via a 0-10V
signal.
9.36.
The unit shall be able to control a second external post heating coil
–
either electric, water or direct expansion
–
via a 0-10V signal.
9.37.
The unit shall be able to control an heat pump either through ON/OFF or 0-10V operation and provide an
enable, error and defrost inputs/outputs.
10.
Ancillaries
10.1.
The units shall be compatible with a range of ancillaries for facilitated installation and control.
10.2.
The specification for each ancillary shall be provided by the MVHR manufacturer